KRAS and non-small cell lung carcinoma: Genetic alterations found in NSCLC oncogenes include the following: EGFR (27% LUAD, <8% LUSC); KRAS (32% LUAD, 3% LUSC); MET (7% LUAD); ALK (<8% LUAD); BRAF (7% LUAD, 4% LUSC); RET (1% LUAD); ROS (2% LUAD), PIK3CA (4% LUAD, 16% LUSC) and ERBB2/3 (3% LUAD, 4% LUSC).